Detecting method and detecting device of driving board of inverter compressor

Abstract

The invention discloses a detecting method and a detecting device of a driving board of an inverter compressor, and the detecting method adopts weak current to detect a strong current circuit, and is supplemented with automatic judgement. The detecting method effectively avoids damage caused to a detected driving board, can carry out qualitative detection and quantitative test to each function circuit, artificial judgement is not needed, so that detecting accuracy and efficiency are remarkably improved. The detecting device of the driving board of the inverter compressor is externally connected with the driving board to be detected and provides at least two direct current stabilized power supplies separated from each other. The detecting device comprises a detecting board with a microprogrammed control unit (MCU), a direct current stabilized power supply, a display board, a direct current voltmeter and an alternating current voltmeter are assembled on the periphery of the detecting board, and the detecting board is provided with a relay carrying out sequential control. The detecting board adopts two routes of independently provided and separated mutually weak current power supplies of + 15V to detect an intelligent power module (IPM) function circuit and an insulated gate bipolar translator (IGBT) function circuit of the driving board to be detected.

Description

technical field [0001] The invention relates to a detection method and a detection device applied to a frequency conversion compressor driving board of a refrigeration device, belonging to the technical field of electric appliance control. Background technique [0002] Existing refrigeration devices belonging to household or commercial appliances, such as air conditioners or refrigerators, generally adopt frequency conversion control technology to achieve the purpose of saving electricity and improving refrigeration efficiency. [0003] There are many detection methods for the inverter compressor drive board, but the detection mode of an external compressor is mainly used, that is, the drive board is actually connected to a compressor prototype, and the strong current detection method is still adopted to simulate the actual use of the drive board. In the environment of signal communication and control with the compressor, the test results still need to be judged manually. ...

AI Technical Summary

Problems solved by technology

[0003] There are many detection methods for the inverter compressor drive board, but the detection mode of an external compressor is mainly used, that is, the drive board is actually connected to a compressor prototype, and the strong current detection method is still adopted to simulate the actual use of the drive board. In the environment of signal communication and control with the compressor, the test results still need to be judged manually

[0004] In the current strong current detection process, if the operation is improper, it will directly cause damage to the detected drive board. For example, if the 220V or 310 drive voltage is used, when the internal device pins are accidentally connected or the operation connection is wrong, it is very easy to cause the detected drive board to be damaged. Board is broken down

Or, when the external compressor is damaged, it is also easy to cause damage to the detected drive board

[0005] And more importantly, the above-mentioned existing detection method is a mode of transplanting the operating state of the air conditioner, which can only make a qualitative judgment on whether the drive board is qualified or not, but cannot make a quantitative judgment, that is, the performance of each module of the drive board is qualified or not. Whether it is impossible to judge in depth

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